Lithuanian (#8134)

* Add lithuanian support to backend

* Lithuanian support for frontend

src/backend/InvenTree/InvenTree/locales.py

@@ -10,6 +10,8 @@ Additionally, update the following files with the new locale code:
 
 - /src/frontend/.linguirc file
 - /src/frontend/src/contexts/LanguageContext.tsx
+
+(and then run "invoke int.frontend-trans")
 """
 
 from django.utils.translation import gettext_lazy as _
@@ -34,6 +36,7 @@ LOCALES = [
     ('it', _('Italian')),
     ('ja', _('Japanese')),
     ('ko', _('Korean')),
+    ('lt', _('Lithuanian')),
     ('lv', _('Latvian')),
     ('nl', _('Dutch')),
     ('no', _('Norwegian')),

src/frontend/.linguirc

@@ -19,6 +19,7 @@
         "it",
         "ja",
         "ko",
+        "lt",
         "lv",
         "nl",
         "no",

src/frontend/src/contexts/LanguageContext.tsx

@@ -36,6 +36,7 @@ export const getSupportedLanguages = (): Record<string, string> => {
     it: t`Italian`,
     ja: t`Japanese`,
     ko: t`Korean`,
+    lt: t`Lithuanian`,
     lv: t`Latvian`,
     nl: t`Dutch`,
     no: t`Norwegian`,

src/frontend/src/locales/lt/messages.d.ts

@@ -0,0 +1,4 @@
+import { Messages } from '@lingui/core';
+          declare const messages: Messages;
+          export { messages };
+